Cisco Hardware

Cisco routers consist of many hardware components. The main components of a Cisco router include the following:

■ Configuration registers

■ Interfaces

Figure 3-1 illustrates the hardware components on Cisco routers.

Figure 3-1 Components of a Cisco Router

Figure 3-1 illustrates the hardware components on Cisco routers.

Random-Access Memory (RAM)

Flash

Read-Only Nonvolatile RAM Memory (ROM) (NVRAM)

Router Interfaces

LAN, WAN, Console, AUX Port

Each hardware component is vital for Cisco routers to operate properly. To help you prepare for the CCIE Security written exam, the next few sections present the main concepts you need to know about Cisco hardware components.